Improvement in steam pttmping-engines



WILLIAM n. ROBERTS, or MAUcII cnUNK, PENNSYLVANIA.

Letters Patent No. 99,953, dated February 15, 1870.

aM- IMPRQVEMBNT IN STEAM PUMPING-ENGINES.

Th!! Schedule referred to in these Letters P atent and making part of the same To all whomit may concern: l

Bc it known that I, WILLIAM H. ROBERTS, 4i'of Manch Chunk, in the county of Carbon, and'State of Pennsylvania, have invented a new and improved Steam Pumping-Engine; and I do hereby `declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to theaccompanying drawings making a part of this speciiication, in which- Figure 1 is a side elevation, and

Figure 2 is an end elevation. Y

This invention has for its object to make the stroke of the piston of a steam-pump uniform as to speed throughout.

The invention relates to arvater'cnshion or regu- I lating cylinder connected with the valve-apparatus for the purpose speciiied. l

The particular causes of the defective operation of the water cushion which this invention seeks to remedy are two, viz: First, leakage from the cylinder, which results in the working of the piston on air during a portion of the stroke and iu a consequent unsteadiness of motion; second, the location oft-he engine either in an inclined or perpendicular position, vwhich is 'frequent-ly found expedient and paratus consisting of a small cylinder, A, placed upon the pump cylinder, the piston of 4the small cylinder being connected with the valve-mechanism of the engine, and said cylinder alternately receiving its water throughinduction-pipes O O' and discharging it through a pipe, G, opening out of the induction-pipes at their point of junction. y u

A small reservoir placed convenient to -the engine supplies the induction-pipes and receives the contents of the discharge-pipe.

' By this arrangement the regulating ways kept. full.

The second of the above-mentioned difficulties is ohviated by placing a choke-valve, E, in the lowerinduct-ion-pipe, which is turned so as to check the flow of water from the cylinder, through the pipe C to the discharge-pipe, when ,the piston is on the down stroke. I

Having thus described my invention,

cylinder is al- What I claim as new, anddesire to secure by 1. The combination with the regulating cylinder A Vhave set my hand thisflst dayof December, A. D.

v W. H: ROBElt'TS.v

Witnesses:

CEAS. A. PE'ITIT, SoLoN O. KeMoN. 

